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Time-Dependent Phenomena in OB Star Winds

Published online by Cambridge University Press:  26 May 2016

Raman K. Prinja
Raman K. Prinja*
Affiliation:
Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, U.K.

Abstract

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Spectroscopic observations are discussed which indicate that the winds of luminous OB stars are highly structured in space and variable in time. Blueward migrating discrete optical depth enhancements in the absorption troughs of P Cygni profiles are the characteristic signatures of the evolving structure. Constraints on physical mechanisms are discussed, provided by the observed accelerations of the migrating features, the evidence for rotationally modulated variability, and the behaviour of the winds at very low velocities.

Type
7. OB Stellar Winds
Information
Symposium - International Astronomical Union , Volume 162: Pulsation, Rotation and Mass Loss in Early-Type Stars , 1994 , pp. 507 - 516
Copyright
Copyright © Kluwer 1994 

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